India and COVID-19 vaccine

India’s population is 1.4 billion, four times greater than in the United States. Yet we have 26 million cases of COVID-19, while they have 10.8 million. As for fatalities, India is closing in on 160,000 through Feb. 4, while the U.S. has recorded 455,000 – nearly three times as many. Further, U.S. healthcare is generally believed to be better than India's. So what’s going on here? More importantly, what can we learn?